TeO_2結晶の二つの多形の基準振動の計算とTeO_2ガラスのラマンピークの帰属

概要

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Raman spectra of paratellurite, telluride and pure TeO_2 glass were measured. The normal vibration of paratellurite and telluride was analyzed. The spectrum of pure TeO_2 glass were deconvoluted into symmetric Gaussian functions. The normal vibrations of paratellurite are exactly described as combined representations of movement of oxygen atom in Te-_<eq>O_<ax>-Te linkage and vibrations of TeO_4 trigonal bipyramid (tbp). Compared the resolved Raman peaks of pure TeO_2 glass with normal vibration of paratellurite, all Raman peaks from 420 to 880 cm^<-1> are assigned to the vibrations of TeO_4 tbp and Te-_<eq>O_<ax>Te linkage. The antisymmetric stretching vibrations of Te-_<eq>O_<ax>-Te linkage have relatively large intensities to symmetric stretching vibrations of Te-_<eq>O_<ax>-Te linkage. In pure TeO_2 glass, TeO_4 tbps are formed by most of tellurium atoms and connected at vertices by the Te-_<eq>O_<ax>-Te linkages.
社団法人日本セラミックス協会の論文
1989-12-01